      module mod_orbit 
      integer NOCCO(2), NVRTO(2) !occ and vrt orbital
      integer POP(8,2) !occ orbital for symmetry and spin
      integer VRT(8,2) !vrt orbital for symmetry and spin
      integer VRTA(8), VRTB(8), POPA(8), POPB(8) !occ orbital and vrt orbital for alpha and beta orbital
      integer NVA, NOA, NVB, NOB!occ and vrt orbital
      integer ZORB(8) ! zero orbitals
      integer NV(8), NO(8) !NO and NV orbitals for different symmetry 
      end module
        
